Dude, it was mentioned several times that Amazon Lily and Impel Down were in the Calm Belt.
Please, reread the question. And this time till the end. And then at least TRY to understand what I've asked…
The answer that I found without your help:
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Yes: Impel Down and Amazon Lily are both in the southern Rakuen Calm Belt, Rusukaina is also there since it's NW of the Women's Island, and Hancock offered to provide food delivery from Amazon Lily each day…
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